Display screen or portion thereof with a graphical user interface



The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.

The FIGURE is a front view of a display screen or portion thereof with a graphical user interface, showing our new design.

The dotted and evenly-dashed broken lines illustrate portions of the graphical user interface, specifically, 24 circles of a 5-by-5 array of circles and an icon and text in the bottom banner, and do not constitute part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 